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Why Two Employees on the Same Plan Can Pay Different Premiums

2 days ago
2 min read

Same employer, same plan, same coverage tier — and still two different premiums. It's not a mistake. Here's what's actually allowed to cause that gap.

Only Four Factors Are Allowed to Affect Your Rate

Small-group health insurance rules restrict insurers to exactly four rating factors: geographic area, age, family size, and tobacco use. That's the entire list. Health history, past claims, industry, gender, and group size are all prohibited from affecting what any individual employee pays.

Age Is the Big One

Age is rated in one-year bands from 21 to 63, with the rate increasing at each band. Everyone 64 and older is charged the same flat rate regardless of exact age. The total spread is capped at a 3:1 ratio — the oldest adult on a plan can be charged at most three times what the youngest adult pays for identical coverage.

Tobacco Use Can Add Up to 50%

If a plan applies a tobacco rating factor, it can raise a tobacco user's premium by up to 1.5 times what a non-user pays for the same coverage — a 50% surcharge, and the single largest factor-driven gap outside of age itself.

What Isn't Allowed to Move the Needle

This is worth knowing as much as what is allowed: an insurer can't charge one employee more because of their health history, because they filed more claims last year, because of their gender, or because of which industry the employer is in. Those factors simply aren't part of the small-group rating formula.

Why This Actually Matters

If two coworkers on the identical plan and tier compare premiums and see a real difference, it's not a billing error and it's not based on anything about their health — it's almost always age, and sometimes tobacco use, doing exactly what the rating rules allow them to do.

Final Thoughts

Two people, same plan, different price — it looks confusing until you know there are only four things legally allowed to cause that gap, and age is doing most of the work. Everything else people assume might be behind it (health, claims, even the industry they work in) legally isn't.

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Service 1st Benefits
Norman, Oklahoma
(785) 694-8035
Serving Norman, Oklahoma City, Edmond, Moore, Midwest City, and the greater OKC metro area.

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